diff --git a/mobile/openapi/README.md b/mobile/openapi/README.md
index 10a44d7df1..92c76b5b28 100644
--- a/mobile/openapi/README.md
+++ b/mobile/openapi/README.md
@@ -146,7 +146,7 @@ Class | Method | HTTP request | Description
 *DeprecatedApi* | [**runQueueCommandLegacy**](doc//DeprecatedApi.md#runqueuecommandlegacy) | **PUT** /jobs/{name} | Run jobs
 *DownloadApi* | [**downloadArchive**](doc//DownloadApi.md#downloadarchive) | **POST** /download/archive | Download asset archive
 *DownloadApi* | [**getDownloadInfo**](doc//DownloadApi.md#getdownloadinfo) | **POST** /download/info | Retrieve download information
-*DuplicatesApi* | [**deleteDuplicate**](doc//DuplicatesApi.md#deleteduplicate) | **DELETE** /duplicates/{id} | Delete a duplicate
+*DuplicatesApi* | [**deleteDuplicate**](doc//DuplicatesApi.md#deleteduplicate) | **DELETE** /duplicates/{id} | Dismiss a duplicate group
 *DuplicatesApi* | [**deleteDuplicates**](doc//DuplicatesApi.md#deleteduplicates) | **DELETE** /duplicates | Delete duplicates
 *DuplicatesApi* | [**getAssetDuplicates**](doc//DuplicatesApi.md#getassetduplicates) | **GET** /duplicates | Retrieve duplicates
 *DuplicatesApi* | [**resolveDuplicates**](doc//DuplicatesApi.md#resolveduplicates) | **POST** /duplicates/resolve | Resolve duplicate groups
diff --git a/mobile/openapi/lib/api/duplicates_api.dart b/mobile/openapi/lib/api/duplicates_api.dart
index e873537592..9bd01281b3 100644
--- a/mobile/openapi/lib/api/duplicates_api.dart
+++ b/mobile/openapi/lib/api/duplicates_api.dart
@@ -16,9 +16,9 @@ class DuplicatesApi {
 
   final ApiClient apiClient;
 
-  /// Delete a duplicate
+  /// Dismiss a duplicate group
   ///
-  /// Delete a single duplicate asset specified by its ID.
+  /// Dismiss a duplicate group by its ID, unlinking all assets in the group without deleting them.
   ///
   /// Note: This method returns the HTTP [Response].
   ///
@@ -51,9 +51,9 @@ class DuplicatesApi {
     );
   }
 
-  /// Delete a duplicate
+  /// Dismiss a duplicate group
   ///
-  /// Delete a single duplicate asset specified by its ID.
+  /// Dismiss a duplicate group by its ID, unlinking all assets in the group without deleting them.
   ///
   /// Parameters:
   ///
diff --git a/open-api/immich-openapi-specs.json b/open-api/immich-openapi-specs.json
index 8dfa1cb2d1..6f9e886185 100644
--- a/open-api/immich-openapi-specs.json
+++ b/open-api/immich-openapi-specs.json
@@ -5172,7 +5172,7 @@
     },
     "/duplicates/{id}": {
       "delete": {
-        "description": "Delete a single duplicate asset specified by its ID.",
+        "description": "Dismiss a duplicate group by its ID, unlinking all assets in the group without deleting them.",
         "operationId": "deleteDuplicate",
         "parameters": [
           {
@@ -5202,7 +5202,7 @@
             "api_key": []
           }
         ],
-        "summary": "Delete a duplicate",
+        "summary": "Dismiss a duplicate group",
         "tags": [
           "Duplicates"
         ],
diff --git a/open-api/typescript-sdk/src/fetch-client.ts b/open-api/typescript-sdk/src/fetch-client.ts
index bc304e483e..5c6fd3bc6b 100644
--- a/open-api/typescript-sdk/src/fetch-client.ts
+++ b/open-api/typescript-sdk/src/fetch-client.ts
@@ -4480,7 +4480,7 @@ export function resolveDuplicates({ duplicateResolveDto }: {
     })));
 }
 /**
- * Delete a duplicate
+ * Dismiss a duplicate group
  */
 export function deleteDuplicate({ id }: {
     id: string;
diff --git a/server/src/controllers/duplicate.controller.ts b/server/src/controllers/duplicate.controller.ts
index 0a8c451ed4..6502c3b2a9 100644
--- a/server/src/controllers/duplicate.controller.ts
+++ b/server/src/controllers/duplicate.controller.ts
@@ -41,8 +41,8 @@ export class DuplicateController {
   @Authenticated({ permission: Permission.DuplicateDelete })
   @HttpCode(HttpStatus.NO_CONTENT)
   @Endpoint({
-    summary: 'Delete a duplicate',
-    description: 'Delete a single duplicate asset specified by its ID.',
+    summary: 'Dismiss a duplicate group',
+    description: 'Dismiss a duplicate group by its ID, unlinking all assets in the group without deleting them.',
     history: new HistoryBuilder().added('v1').beta('v1').stable('v2'),
   })
   deleteDuplicate(@Auth() auth: AuthDto, @Param() { id }: UUIDParamDto): Promise<void> {
diff --git a/server/src/services/duplicate.service.spec.ts b/server/src/services/duplicate.service.spec.ts
index 564cffa0bc..18e3e664b5 100644
--- a/server/src/services/duplicate.service.spec.ts
+++ b/server/src/services/duplicate.service.spec.ts
@@ -1,3 +1,4 @@
+import { BadRequestException } from '@nestjs/common';
 import { BulkIdErrorReason } from 'src/dtos/asset-ids.response.dto';
 import { MapAsset } from 'src/dtos/asset-response.dto';
 import { AssetType, AssetVisibility, JobName, JobStatus } from 'src/enum';
@@ -149,6 +150,36 @@ describe(DuplicateService.name, () => {
     });
   });
 
+  describe('delete', () => {
+    it('should throw for an unknown or unauthorized group id', async () => {
+      mocks.access.duplicate.checkOwnerAccess.mockResolvedValue(new Set());
+      await expect(sut.delete(authStub.admin, 'group-1')).rejects.toThrow(BadRequestException);
+      expect(mocks.duplicateRepository.delete).not.toHaveBeenCalled();
+    });
+
+    it('should dismiss the duplicate group', async () => {
+      mocks.access.duplicate.checkOwnerAccess.mockResolvedValue(new Set(['group-1']));
+      mocks.duplicateRepository.delete.mockResolvedValue();
+      await expect(sut.delete(authStub.admin, 'group-1')).resolves.toBeUndefined();
+      expect(mocks.duplicateRepository.delete).toHaveBeenCalledWith(authStub.admin.user.id, 'group-1');
+    });
+  });
+
+  describe('deleteAll', () => {
+    it('should throw if any group id is unknown or unauthorized', async () => {
+      mocks.access.duplicate.checkOwnerAccess.mockResolvedValue(new Set(['group-1']));
+      await expect(sut.deleteAll(authStub.admin, { ids: ['group-1', 'group-2'] })).rejects.toThrow(BadRequestException);
+      expect(mocks.duplicateRepository.deleteAll).not.toHaveBeenCalled();
+    });
+
+    it('should dismiss all duplicate groups', async () => {
+      mocks.access.duplicate.checkOwnerAccess.mockResolvedValue(new Set(['group-1', 'group-2']));
+      mocks.duplicateRepository.deleteAll.mockResolvedValue();
+      await expect(sut.deleteAll(authStub.admin, { ids: ['group-1', 'group-2'] })).resolves.toBeUndefined();
+      expect(mocks.duplicateRepository.deleteAll).toHaveBeenCalledWith(authStub.admin.user.id, ['group-1', 'group-2']);
+    });
+  });
+
   describe('resolve', () => {
     it('should handle mixed success and failure', async () => {
       const asset = AssetFactory.create();
diff --git a/server/src/services/duplicate.service.ts b/server/src/services/duplicate.service.ts
index 39123e031c..6e9e62ba0b 100644
--- a/server/src/services/duplicate.service.ts
+++ b/server/src/services/duplicate.service.ts
@@ -82,10 +82,12 @@ export class DuplicateService extends BaseService {
   }
 
   async delete(auth: AuthDto, id: string): Promise<void> {
+    await this.requireAccess({ auth, permission: Permission.DuplicateDelete, ids: [id] });
     await this.duplicateRepository.delete(auth.user.id, id);
   }
 
   async deleteAll(auth: AuthDto, dto: BulkIdsDto) {
+    await this.requireAccess({ auth, permission: Permission.DuplicateDelete, ids: dto.ids });
     await this.duplicateRepository.deleteAll(auth.user.id, dto.ids);
   }